Effect of prosthetic design on center of pressure excursion in partial foot prostheses

Michael P. Dillon, Stefania Fatone, Andrew H. Hansen

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Investigations into the gait of persons with partial foot amputation (PFA) suggest that the effective foot length can be restored when the prosthesis incorporates a relatively stiff forefoot, restricts dorsiflexion, and includes a mechanism whereby forces caused by loading the toe lever can be comfortably distributed to the leg (e.g., an anterior tibial shell). The purpose of this investigation was to systematically alter these variables to understand which design elements are responsible for restoration of the effective foot length. By manipulating features of the prosthesis design in two persons with PFA, we demonstrated using three-dimensional motion analysis that the prosthesis must incorporate each of these design elements to restore the effective foot length. When these design elements were used in concert, the persons with PFA adopted a gait pattern more consistent with non disabled persons. Further work is required on a larger cohort to ensure the observations are generalizable.

Original languageEnglish (US)
Pages (from-to)161-178
Number of pages18
JournalJournal of Rehabilitation Research and Development
Volume48
Issue number2
DOIs
StatePublished - 2011

Keywords

  • Amputation
  • Artificial limb
  • Center of pressure
  • Foot length
  • Gait
  • Lisfranc
  • Partial foot
  • Prosthesis
  • Prosthetic design
  • Rehabilitation
  • Transmetatarsal

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